spacetoday.net: space news from around the webin association with SpaceNews


Lunar rocks provide evidence for collisional formation model
Posted: Sat, Jun 7, 2014, 9:36 AM ET (1336 GMT)
An analysis of the chemistry of lunar meteorites and rocks has provided scientists with new evidence that the Moon formed as the result of a collision of a protoplanet with the early Earth. Isotopic analysis of oxygen found in several lunar meteorites, as well as rocks returned from the Moon by the Apollo missions, showed that the lunar samples had a slight increase in oxygen-17 concentrations versus terrestrial rocks. That enhanced oxygen-17, scientists argue, is likely from rocks from the Mars-sized planetesimal that collided with the Earth, the leading model to form the Moon. Previous tests had shown little isotopic variation between terrestrial and lunar rocks, even though impact formation models concluded more debris from the colliding object should have ended up on the Moon.
<<previous article   next article>>
news in brief
Starship explodes during preparations for static-fire test
Posted: Sun, Jun 22 6:52 AM ET (1052 GMT)

French government leads investment in Eutelsat
Posted: Sat, Jun 21 8:38 AM ET (1238 GMT)

NASA further delays Ax-4 launch
Posted: Sat, Jun 21 8:34 AM ET (1234 GMT)

news links
Thursday, July 3
SpaceX double launch lights up Florida sky, but most Volusia beachgoers don't notice
Daytona Beach (FL) News-Journal — 2:39 am ET (0639 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list